Eraser attachment for type-writers.



JOHN a. PIERRE, or rnEEronT, 'NEW YORK'.

ERASER ATTACHMENT FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented May 3o, 1916.

Application filed February 12, 1916. Serial No. 77,955.

To all whom 'it may concer-n vBe it known that I, J oHN J. PIERRE, a citizen of the United States, 'residing at Freeclear, and exact .1.10

. of reference marked thereon,

niso

` port, Long Island, in.

same, reference being made Iin typewriting.

[the drawings by numeral, opposite sides of the top the county of Nassau and State of New York, have invented certain -new and useful Improvements in Eraser Attachments for TypefWriters;A and I do hereby declare description of the invention, such as'willl enable others skilled in the art to which it appertains to make and use the had to the accompanying drawings, and to the letters and figures which form an part of this specication.

This invention relates to certain new and useful 'improvements in attachments for typewriting machines and it has for its speeiiic object the provision of an attachment for use in correcting errors in writing'without 4 the necessity of removing the Vpaper from the line of vwriting and also obviates the necessity of using erasers now commonly employedvfor this purpose, thereby effecting 'a large saving of time incident to the lookingfor an'eraser when an error has been Tothese ends and invention may pertain, the same consists in the novel construction and in the peculiar arrangement, combination and adaptation of parts,l all as will be more fully hereinafter described, `shownin the accompanying drawings and. then specificaliy defined in the appended claims.

' The invention is panying drawings which illustrated in the accomwith lthe numerals of reference marked thereon, lform a part o this specification Figurel isatop .-planview of .typewriter showing my invention applied thereto. Fig. 2y is a view on line 2--2 of ig.

1l Fig. 3 is a detail inside elevation of the. v eraser block carrier. Fig. ...4.5v

" plan-view of a 4 is a like view of removed, and Fig. 5 is a top portion of a sheet of paper bowing the relativev position of the eraser block when in use.

Reference now being had to the details of 1, 1 represent the the eraser block and 2 the platen of the machine.

he ends of which are 3 is a metallic bent downward and held to the face of the typewriter frame by screws or other fasten- :hn' mnnng. 3S Shown 4.

the following to be a full,

Y which is shown in member 3.' 21

Vaga-inst the bracket` 8, shaft being extended'beyond the outer edge to such others as the -One arm of the a visible of a typewriterv 5 is a shaft, the body p ortion of which is' toits normal position or extreme outward throw being automatically .accomplished byv a spring 1S. The inner end of the shaft 16 is provided with a suitable holder 19 to receive an eraser block 20, the preferable form of the drawings as a truncated pyramid, the received within the holder 19. The shaft 5 is suitably. journaled in the bracket 8 and the downwardly depending arm 6 of the end of this shaft '5, hearing atoone end the other end of saidof the typewriter frameand has fixed thereon a collar 9.

10 is a bell crank lever liournaled withinl suitable bearings provided inthe bracket 11 upon the outer end of the typewriter frame. bell crank'lever has pivoted thereto one end vof a link 12, the other end of which is connected to a member 2:2 mounted loosely on the rod 5 and adapted to abut against the collar. 9." The other member or arm 23 of the bell crank lever is suitably connected with an operating key 24, as

f shown. Upon the opposite end of the typewriter frame, l have shown in dotted lines a shaft 25,'the outer end of which is extended beyond the end of thev frame and provided with an operating lever, 26, which may be connected to a key on mechanism of thecrank arm'27 end with a movable collar 26 upon the shaft 1,6,.serve to impart an upward movement to said shaft,` thereby forcing the eraser block into contact with the paper of thel machine at the fpoint at which the letter is to be erased, `the shaft being rotated by the engagement' of the teeth upon the rack bar with the serrations or teeth upon the body portion 15 opposite said shaf As it will be atonce evident that the center vof the' eraser block will not have an abrading effect or movement and it is necessary to utilize the outer portion of the face portion of which isis a spring around the inner. v

the key board, themovementof which 'lever will, throughY the at-its inner upon the platenA esv 9o fl,

the point 27 in Fig. 5.

From the foregoing description, the op-v eration ofthe device will be at once readily understood. When it is designed to throw the eraser block into operative position relative to the platen, this is accomplished by forcing the shaft 16 inward 'against the action of the spring 18. This inward thrust will cause the erasing surface of the eraser block to be thrown into contact with the paper atthe point at -which vthe letter to be'k erased islocated. By forcing downward'the arm of the bell crank lever to its engagement with the operating rod 23, the shaft will, through the means of the pivoted bell crank lever,' bev forced inward, thus lrotatL l ing the eraser carrying shaft 1G and, upon releasing the pressure upon `the key 24, the.

eraser block will be rotated in an l opposite direction by thev action vof the spring 21. It will be' noted that the longitudinal movement imparted to the shaft 16 carrying the eraser block may be accomplished either by an inward pressure applied 'to the button or handle upon the outer end of theshaft or by means of the lever 26.

Having thus described my invention, what I claim to be new and desire to secure by Letters Patent is:

1. An erasing attachment for typewriters, embodying a supportingI member, ashaft supported therein, nanerasing block'disposed for end engagement with the paper on the platen, and means'for rotating the block from said shaft said block being so disposed that the outer portion only of the end sur- `40 face of the'block-is utilized lfor erasing purposes.

2. An erasing attachment for typewriters,

embodying a supporting` member, a shaft supported therein, a tapered erasing block disposed for end engagement with the paper on the platen, means for rotating the block from said shaft said block being so disposed. that-.the outer portion only' of the end surface of the block is util-ized for erasing purposes, and means for reversing the direction of rotation of said block to withdraw it yfrom engagement with the paper.

3. An erasing attachment for typewriters comprising .a supporting member. for at- A tachment to a typewriter frame, a shaft longitudinally movable in bearings on said member, a 'transversely disposed rotatable shaft mounted in said member, a polygonal erasing block carried by the last-named shaft, and interengaging means on the two 60 shafts for causing the rotation Iof the last-` v named shaft by the yreciprocation of .the'

'former 4. Air erasing attachment for typewriters 'comprising a supporting member forI at- 65 tachment to av typewriter frame, a shaft longitudinally movable in bearings on said member, a transversely disposed rotatable shaft mounted in said member, a polygonalerasing block. carried by the last-named' 70 shaft, interengaging means on the two shafts for causing'the rotation of the lastnamedshaft by the reciprocation of the `former, av springfor returning the -firstnamed shaft to itsnormal position, and a springlacti'ngy on the second-named shaft to return it to its normal position. l

f 5. In anv eraser attachment for typewriters, an eraser block holdermovable longitudinally to present the'face of an eraser 80 block into contact with the platen of a typewriter, the shaftof thel eraser holder being provided with any elongated body portion, serrated as described, a.reciprocatory transverse shaft provided with a rack bar 85 so positioned as to engage the teeth or serrations upon the shaft of the eraser block holder to effect a rotation thereof, substantially as shown and described. l

6. Ina device of the character described, the combination with a typewriting frame, of an eraser block holder and an eraser block of polygonal form carried thereby for end engagement with ythe paper, means' whereby the shaft of theeraser holder ycan be rotated in one direction by the depression of an operating lever and in its opposite direction automatically rotated spring action, substantially as shown and described.

7. In a device of the character described, 100. the conibinatio11-with a typewriter of a'movy able eraser holder adapted to be moved'inward to position an eraser block of polygonal form in end contact with thevplaten of a typewriter, means for rotating the eraser block holder, andl means for automatically retracting and withdrawing the eraser block from its operative position, substantially as shown and described.

.In testimony whereof I hereunto. aflix my signature in presence of two witnesses.

JOHN J. PIERRE.

lVitnes-ses:

HARRY A. HENKEL, -JAMEs LITTLE. 

